123404544445 has 24 divisors (see below), whose sum is σ = 183260451456. Its totient is φ = 78111004608.

The previous prime is 123404544401. The next prime is 123404544457. The reversal of 123404544445 is 544445404321.

It is not a de Polignac number, because 123404544445 - 2¹³ = 123404536253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123404544398 and 123404544407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10425577 + ... + 10437406.

It is an arithmetic number, because the mean of its divisors is an integer number (7635852144).

Almost surely, 2^123404544445 is an apocalyptic number.

It is an amenable number.

123404544445 is a deficient number, since it is larger than the sum of its proper divisors (59855907011).

123404544445 is a wasteful number, since it uses less digits than its factorization.

123404544445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20863021 (or 20863008 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 40.

Adding to 123404544445 its reverse (544445404321), we get a palindrome (667849948766).

The spelling of 123404544445 in words is "one hundred twenty-three billion, four hundred four million, five hundred forty-four thousand, four hundred forty-five".